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UCC2857L PDF预览

UCC2857L

更新时间: 2024-11-26 20:02:15
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理开关
页数 文件大小 规格书
10页 125K
描述
1A POWER FACTOR CONTROLLER, 500kHz SWITCHING FREQ-MAX, CQCC20

UCC2857L 技术参数

生命周期:Obsolete零件包装代码:QLCC
包装说明:QCCN,针数:20
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.84
模拟集成电路 - 其他类型:POWER FACTOR CONTROLLER控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:16 V
最小输入电压:9 V标称输入电压:12 V
JESD-30 代码:S-CQCC-N20长度:8.89 mm
功能数量:1端子数量:20
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:1 A封装主体材料:CERAMIC, METAL-SEALED COFIRED
封装代码:QCCN封装形状:SQUARE
封装形式:CHIP CARRIER认证状态:Not Qualified
座面最大高度:2.54 mm表面贴装:YES
切换器配置:BOOST最大切换频率:500 kHz
技术:BICMOS温度等级:INDUSTRIAL
端子形式:NO LEAD端子节距:1.27 mm
端子位置:QUAD宽度:8.89 mm
Base Number Matches:1

UCC2857L 数据手册

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UCC1857  
UCC2857  
UCC3857  
PRELIMINARY  
Isolated Boost PFC Preregulator Controller  
FEATURES  
DESCRIPTION  
PFC With Isolation, V < V  
The UCC3857 provides all of the control functions necessary for an Iso-  
lated Boost PFC Converter. These converters have the advantage of trans-  
former isolation between primary and secondary, as well as an output bus  
voltage that is lower than the input voltage. By providing both power factor  
correction and down conversion in a single power processing stage, the  
UCC3857 is ideal for applications which require high efficiency, integration,  
and performance.  
O
IN  
Single Power Stage  
Zero Current Switched IGBT  
Programmable ZCS Time  
Corrects PF to >0.99  
The UCC3857 brings together the control functions and drivers necessary  
to generate overlapping drive signals for external IGBT switches, and pro-  
vides a separate output to drive an external power MOSFET which pro-  
vides zero current switching (ZCS) for both the IGBTs. Full programmability  
is provided for the MOSFET driver delay time with an external RC network.  
ZCS for the IGBT switches alleviates the undesirable turn off losses typi-  
cally associated with these devices. This allows for higher switching fre-  
quencies, smaller magnetic components and higher efficiency. The power  
factor correction (PFC) portion of the UCC3857 employs the familiar aver-  
age current control scheme used in previous Unitrode controllers. Internal  
circuitry changes, however, have simplified the design of the PFC section  
and improved performance.  
Fixed Frequency, Average Current  
Control  
Improved RMS Feedforward  
Soft Start  
9V to 18V Supply V Range  
20-Pin DW, N, J, and L Packages  
(continued)  
TYPICAL APPLICATION CIRCUIT  
+
T1  
C
F
RECTIFIED  
V
AC INPUT  
BIAS  
SUPPLY  
QA  
Q1  
Q2  
OUT  
R
S
FEEDBACK  
CKT  
REF  
Z
C
OPTO  
R
AC  
13  
3
PKLMT MOUT  
IAC  
7
8
4
15  
CA–  
CAO VIN  
VD  
1
2
MOSDRV 14  
IGDRV1 16  
IGDRV2 18  
DELAY 12  
CRMS  
UCC3857  
10 VA–  
11 VAO  
Z
V
REF  
REF  
5
VREF  
SS  
20  
RT  
19  
CT  
20  
PGND  
17  
AGND  
6
UDG-98065  
02/99  

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